Adjustable gage-pin for tympans.



J. R. GROVE.

ADJUSTABLE GAGE PIN FOR TYMPANS.

APPLICATION FILED 020.22.1911.

1 56911 1 Patented Feb. 12, 1918.

JACOB ROHB GROVE, 0F LVIAN$FIELID, PENNSYLVANIA.

ADJUSTABLE GAGE-FIN FOR TYMPANS.

Specification of Letters Patent.

Patented Feb. 12, 1918.

Application filed. December 22, 1917. Serial No. 208,501.

To all whom it may concern:

Be it known that 1, Moon R. Gnovn, citizen of the United States ofAmerica, and resident of Mansfield, Tioga county, Pennsylvania, haveinvented new and useful Ad justable Gage-Pins for Tympans, of which thefollowing is a specification.

The object of this invention is to provide an improved construction forgage-pins for tympans especially adapted for use on platen printingpresses.

A further object of this invention is to provide an improvedconstruction for gagepins adapted to receive and support a stripper forlongitudinal movement therein.

My invention consists in the construction, arrangement and combinationof elements hereinafter set forth, pointed out in my claims andillustrated by the accompanying drawing, in which- Figure l is a planillustrating a blank from which the base member of my improved gage-pinis made. Fig. 2 is a plan illustrating the completed gage-pin togetherwith the stripper mounted for adjustment therein, the tool being shownin connection with a portion of a tympan. Fig. 3 is a front endelevation of the device shown in Fig. 2.

The gage-pin proper or base member of the device preferably is made of asingle piece of sheet metal by stamping, folding or bending, and in theconstruction thereof a blank shown in Fig. 1 preferably is employed. Theblank is generally rectangular in shape and comprises a transverse headmember 10 having a centrally arranged rectangular opening 11. The blankalso is formed with spaced parallel prongs 12, 13 extending at rightangles to and spaced from the ends of the head member 10 and said prongsare formed with opposing notches 14, 15 in their inner margins andadjacent the outer ends thereof. The blank also is formed with a centralprong 16 between, spaced from and of greater length than the prongs 12,13, which central prong also is at right angles to the head member 10.The outer end portion of the central prong 16 of the blank is attenuatedor sharpened. The blank is further formed with V-shaped pointed ortriangular lugs 17 18 projecting from the rear margin thereof adjacentto and slightly spaced from the outermost margins of the prongs 12, 13.The blank is adapted to be bent on a dotted line 19 into a position sothat the head member 10 will stand at right angles to the position inwhich it is shown in Fig. 1 and at right angles to the plane of theprongs. During such oper ation of bending the lugs 17, 18 are turnedinto a position at right angles to the position in which they are shownin Fig. 1 so that they project from and at right angles to the plane ofthe prongs. The blank is adapted to be bent on dotted lines 20, 21 sothat end portions of the head member 10 will be turned into at rightangles to the body of the head member and projecting laterallytherefrom. The blank is further adapted to be bent on dotted lines 22,23 so that end portions of the prongs 12, 13 are turned into positionsforming acute angles with the body of said prongs and being opposed toand spaced from the out-turned head member.

A stripper 24cis slidingly mounted in the notches 14., 15 of the prongs12, 13 and is formed with laterally projecting lugs 25, 26 at one endadapted to engage the outturned end portions of the prongs and preventwithdrawal of the stripper in one direction. The stripper 24 is formedwith a centrally arranged longitudinally extending tongue 27 slidinglymounted in and extending through the opening 11 of the head member 10.The tongue 27 further connects the stripper to the base member andserves to overlie a marginal portion of a sheet being printed'in a presswith which this device is associated and employed. The stripper 24 isadjusted longitudinally of the base member by hand to fix and determinethe degree of projection of the tongue 27 with respect to the desiredmargin of a sheet being printed.

In practical use this device is mounted singly or in multiple in desiredrelations on a tympan, a fragment of which is shown in Figs. 2 and 3 andindicated by the numeral 28. Each device is mounted on the tympanmanually by engaging and penetrating the tympan with the attenuated,pointed and sharpened end of the prong 16, said prong being passedthrough and beneath the tympan to the degree indicated and determined bythe operator necessary so to locate the head member 10 that it willserve as a stop or gage positions approximately for a sheet to beprinted. Such arrangement and location of the prong 16 moves said prongslightly out of the plane of and inclined relative to the prongs 12, 13and I employ a material somewhat resilient in character so that in suchposition there will be a tendency on the part of the tool, by reason ofcomposition of forces to hold the tool in the position in which it isadjusted manually by friction. with the tympan. This efiect also issustained by friction of the prong 16 on the platen beneath the tympan.

The lugs 17, 18 are pressed into the tympan and give stability to thelocation of the tool, especially in respect of pivotal movement on thepenetrating connections of the prong 16 with the tympan. Then thestripper 24: is adjusted manually to give the desired penetration to thetongue 27 and the device is ready for use in operating the printingpress with which it is associated.

I claim as my invention 1. A blank for gage-pins for tympans, whichblank is generally rectangular in form having spaced prongs also spacedfrom the side margins of the blank, the central prong being of greaterlength than the side prongs and attenuated at its outer end,,the sideprongs having opposing notches, the blank also having pointed lugsadjacent to the side prongs, the blank also having an opening in thecenter of its widest end portion, said blank being adapted to be bent atright angles at the base of the prongs and also being adapted to be bentat right angles adjacent to the ends of its widest end portion, saidblank also being adapted to be bent on lines transversely of theoutermost prong adjacent to the inner ends of the opposing notches ofsaid prongs.

2. A gage-pin for tympans, comprising a head member, spaced guide prongsat right angles to the head member, the outer ends of said guide prongsbeing turned into the plane of the head member and formed with opposingnotches, a pin prong of greater length than the guide prongs and locatedGenie: of this patent may be obtained tor a. A gage-pin for tympans,comprising a.-

head member, spaced guide prongs at right angles to the head member, theouter ends of said guide prongs being turned intothe plane of the headmember and formed with opposing notches, a pin prong of greater lengththan the guide prongs and located be tween them, said head'member beingformed with a central opening, said head member being also formed withsharpened lugs adapted to engage a tympan, end portions of the headmember being turned out of the plane of the body thereof toward theoutturned ends of the guide prongs.

5. A gage-pin for tympans, comprising a head member, spacedguideprongsat right angles to the head member, theouter ends of saidguide prongs being turned into the plane of the head memberandiormedwith opposing notches, apinprong of greater length than theguide prongs and located between them, said head member beingformed'with a central opening, saidhead member bemg also formed withsharpened lugs adapted to engage a tympan,'1n' comb1? nation with astripper slidingly mounted insaid notches and opening, said stripperbeing formed with a tongue projecting beyond the head member and adaptedto overlie I sheet being printed.

Signed by me at Mansfield, Pennsylvania, this 24th day of J anuary,'1917i JACOB Bonn enovn.

Washington, D. G.

